LDAP authentiation

Scenario:

LDAP authentiation

Solution:

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using System.DirectoryServices.Protocols;
using System.Net;

public void AuthenticateUser(string name, string pass)
{
    using (var ldapCon =
                    new LdapConnection(new LdapDirectoryIdentifier(server, 636)))
    {
        ldapCon.Credential = new NetworkCredential(servUser, servPass);
        ldapCon.AuthType = AuthType.Basic;

        var options = ldapCon.SessionOptions;
        options.SecureSocketLayer = true;
        options.ProtocolVersion = 3;
        options.VerifyServerCertificate = (con, cer) => true;

        ldapCon.Bind();

        var result = (SearchResponse)ldapCon.SendRequest(new SearchRequest(query,
            "samAccountName=" + name, SearchScope.Subtree));

        foreach (SearchResultEntry entry in result.Entries)
        {
            ldapCon.Bind(new NetworkCredential(entry.DistinguishedName, pass));
            var userID = entry.Attributes["samaccountname"][0].ToString();
            for (var i = 0; i < entry.Attributes["memberOf"].Count; i++)
            {
                //permissions
            }
        }
    }
}